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MA46069 - LIC-WAIT SYSTEM HANG DURING NORMAL OPERATIONS WITH AMS

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 APAR (Authorized Program Analysis Report)

Abstract

LIC-WAIT SYSTEM HANG DURING NORMAL OPERATIONS WITH AMS

Error Description

During 7.2 to 7.3 upgrade, IPL took extensive time at C9002AA1  
until it was powered off and IPL'd back up. This was on an AMS  
partition.                                                      

Problem Summary

****************************************************************
* PROBLEM: (MA46069) Licensed Program = 5770999 for i 7.1,     *
*                                        i 7.2, and i 7.3      *
*           Crash/Hang Requiring an IPL to Recover.            *
****************************************************************
* USERS AFFECTED: All IBM i operating system Advanced Memory   *
*                 Sharing (AMS) users.                         *
****************************************************************
* RECOMMENDATION: Apply LIC PTF MF63013 for i 7.1.             *
*                 Apply LIC PTF MF62986 for i 7.2.             *
*                 Apply LIC PTF MF62984 for i 7.3.             *
****************************************************************
On a partition configured to use Advanced Memory Sharing (AMS),
system operations may hang waiting for I/O requests to complete.

Problem Conclusion

A deadlock occurred while processing virtual I/O device        
responses in an AMS environment due to unexpected contention on
internal resources. The Licensed Internal Code will change to  
avoid this resource deadlock while handling I/O responses for  
virtual I/O client adapters.                                    

Temporary Fix

                       *********                                
                       * HIPER *                                
                       *********                                

Comments

Circumvention


PTFs Available

R710 MF63013 PTF Cover Letter   7192
R720 MF62986 PTF Cover Letter   7068
R730 MF62984 PTF Cover Letter   7061

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... Yes
Component.................................. 9400DG300
Failing Module.......................... RCHMGR
Reported Release................... R730
Duplicate Of..............................




System i Support

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Document Information

Modified date:
28 July 2017